Julius schulke



(No-Model.)

J. SOHULKE.

LAMP FOR RAILROAD CARS AND OTHER VEHICLES. No. 268,134.

fil Patented Nov. g8, 18%

Plwlvljlhugnpho', Was a JULIUS SCHULKE, OF BERLIN, GERMANY.

LAMP FOR RAILROAD-CARS AND OTHER VEHICLES.

SPECIFICATION forming part of Letters Patent No. 268,134, dated November 28, 1882.

Application filedJune 30,1882. (No model.)

To all whom it may concern Be it known that I, JULIUS SGHi'ILKE, of Berlin, Prussia, Germany, have invented certain new and useful Improvements in Lamps for ltailroadCars and other Vehicles, of which the following is a specification.

The object of this invention is to furnish an improved construction of lamps for railwaycars and locomotives using compressed illuminating-gas, so that a steady and effective flame is obtained, notwithstanding the powerful currents of air to which these lamps are exposed; and the invention consists of an improvement in the class of a car-lamp in which the air, as well as the illuminating-gas, is heated on its way to the burner, and in which an equilibrium of pressure is established, as set forth in the claims.

In the accompanying drawings, Figures 1 and 2 represent "ertieal central sections of my improved railway-car lamp, said sections being taken upon axial planes at right angles to each other. Fig. 3 is a detail top view of the hingejoint of the lamp, and Figs. 4 and 5 are a vertical central section and a side elevation of a modified form of the lamp.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, K represents the cast-metal casing of my improved gas-lamp for railway-cars, which casin g is closed by a top, 1), having a cylindrical extensioinp, closed by a convex cap, 11 The extension p is provided with two rows of openings, A E, that are arranged equidistantly from each other around thecircumferenccofthecylindricalextensionp.

To the lower part of the cast-iron body K is applied a glass globe, d, which forms the lower part of the lamp, through which the light is emitted, and which closes the lamp entirely at the lower part, so that all the air required for combustion is drawn from the outside through perforations of, the extension 11.

A reflector, f, of convex shape, is arranged above the gas-burner g, which receives its gassupply by a gas-tube, 9. On the flanged circumference of the reflector f rests a hollow conical body, 12, which is made of any suitable non-conductor of heat.

In the interior of the hollow body o is arranged a sheetmetal lamp-chimney, R, which is made of two sections, the lower one being attached to an upwardly-bentflange surround ing the central elongated opening of the reflector f, while the upper section is attached to a conical deflector, which is riveted at its lower circumference to the extension-cylinder p at some distance below the eduction-openings A. The hollow conical body 12 forms an annular passage'or channel, 0, around the chimney for the air, which enters through the induction-openings E and passes downward and through perforations in the' circumferential flange of the reflector to the flame in the space inclosed by the reflector and the globe, as indicated by arrows marked 0. The annular space inclosed by the body '0 should be as small as possible, so as to reduce as much as possible the area of the channel 0. The products'of combustion pass upward through the chimney and leave the extension-cylinder 1) through the eduction-openings A, as shown clearly by the arrows marked a in the drawings. The heat radiated by the chimneyR heats up the air in its downward passage to the flame, so that a more perfect combustion of the illuminating-gas is obtained. The gas which is conducted to the flame is also heated up in its passage to the burner by bending the tube 9 in the form of a loop, bend, or coil, g which loop or coil is arranged in the lower section of the lamp-chimney R, where it is heated up by the direct action of the flame and the hot products of combustion.

The gas-tube g is coupled by a swiveljoint, I, to the gas-supply pipe, so that the interior part of the lamp-which consists of the top 12, the extension-cylinder p, the interior cone, 1;, reflector d, gas-tube g, and burner gmay be swung on the swivel-joint bodily outof the casing, for which purpose the hollow conical body 1; is recessed at a point diametrically opposite to the swivel-joint P, so as to admit it to pass out of the casing in raising or lowering the interior for cleaning and repairs.

7 The air-induction openings E and the eduction-openings A of the extension-cylinder p are acted upon at the same time and in the same manner by the exterior air'currents to which lamps of this class are continually exposed. As the air-curren ts exert pressures of opposite directions to each other on the flame, they neutralize each other and produce a nearly constant equilibrium of the air at the interior of the lamp, so that the fluttering of the flame or the entire extinction of the lamp by strong exterior air-currents is madeimpossible. The heating up of the air and of the gas may be accomplished, however, by difi'erent de-' vices, as I do not confine myself specifically to the construction shown in Figs. 1 and 2.

A modified construction is shown in Fig. 4, in which the air is conducted in a continuous current, but in an opposite direction to the products ofcombustion, through a series of annular channels formed by interposing concentric cylinders and diaphragms of sheet metal, which are attached to the chimney It, between concentric cylinders attached to a support, L, of suitable non-conducting material,'as shown clearly in Fig. 4. The gas-supply tube F, Fig. 4, passes in this case centrally through the chimney R, and is heated up by the action of the flame and the products of combustion thereon.

The top extensio11,p,of the lampis furthermore connected by a tube, 15, with a gas-pressure regulator, for the purpose of equalizing the air-pressure upon the regulator and lamp and making them as much as possible independent of the differences of pressures of the atmospheric air, as will more fully appear from a separate application for a gas-pressure-regulating apparatus which is tiled at the same time herewith.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A railway-car lamp having a gas-supply tube, F, passing down through its center, an extension-top, 1), a central chimney, a series of annular air-channels formed by concentric cylinders and diaphragms, the support L, a glass globe below the burner, circumferentiallyarranged induction and eduction openings in the extension-top, the cap 19 and the tube t, substantially as described.

2. In gas-lamps for railway-cars, the combination of the lamp'casing K, having a glass bowl, d, and reflector f, top 1), cylindrical extension 19, having induction-openin gs E and eductiouopenings A, interior gas-chimney, R, tube t, and non-conducting cone o, forming an airchannel, 0, around the chimney, substantially as described.

3. The combination, in a railway-car lamp, of a tube, t, casing K, having a glass globe, d, top 10, and extension-cylinder 12, having circumferentially arranged induction-openings E and eduction-openings A, which communicate respectively with an interior air-channel, (J, and an interior chimney, R, whereby the effect of the exterior air-currents upon the flame is neutralized by the equilibrium of pressure established within the lamp, substantially as described.

4, In a gas-lamp, the casing K, swiveljoint P, gas-supply pipe 9, top 12, extension-cylin der 1), interior recessed case [7, burner g, and air-channel O, substantially as described.

In testimonythatlclaim the foregoing as my invention 1 have signed my name in presence of two subscribing witnesses. I

JULIUS SGHULKE.

\Vitnesses:

B. R01, HIRsoH MosEs. 

